http://www.dailymail.co.uk/news/article-3526667/Wild-horses-couldn-t-drag-away-Battle-scarred-stallions-snapped-sparring-Cambridgeshire-wetlands.html

https://jeffollerton.wordpress.com/2014/12/07/winter-visit-to-wicken-fen/

https://www.nationaltrust.org.uk/wicken-fen-nature-reserve

http://www.equiculture.com.au/CLM91wickenfen.pdf